How to use html editor in our web page?

Hi all,
I have one web page, in it i want to get the content from user for some description…
I used earlier as a text area field…
Now i want to put simple HTML tags included editor.(as like we enter this description in sitepoint).
How to include this…
Suggested good one to include in my web page…

How you do this depends on what server side language you have available on your server. All JavaScript can do is to make entering the formatting information easier, it can’t do any of the actual update processing.

using the server side scripting language – php.
Now give me suggestions for that problem…
Thanks for replying me…